/title command does not work in multiplayer

When using the command /title the text does not appear on your screen, even if it says "Title command successfully executed" in chat (or command block output area). The command I used is:

/title @a title {text:"Kill all your opponents!",color:"dark_purple"}"

Yes I saw the e as well, after I uploaded it , but if I delete it it still does not work on multiplayer, the way I saw this bug I was working In SinglePlayer on PvP map that uses titles(about 20 of command blocks with command /title) and I saw that none of them worked when I uploaded the world to my server and none had an e behind them(exept this one ). The Issue is still not rewsolved In snapshot 14w28b, sorry for my tiny mistake in previaus update, I have uploaded a new screenshot of the command and its output.